// 首字母大写
export const firstLetterCase = (word) => {
  return word.charAt(0).toUpperCase() + word.slice(1)
}

export const formatDate = (
  dateTemplate = 'YYYY-MM-DD hh:mm:ss',
  date = new Date()
) => {
  date = new Date(date)
  if (!(date instanceof Date)) {
    throw new Error('您传入的类型不是时间格式！')
    return false
  } else {
    const YYYY = date.getFullYear()
    const M = String(date.getMonth() + 1)
    const MM = M.padStart(2, '0')
    const D = String(date.getDate())
    const DD = D.padStart(2, '0')
    const h = String(date.getHours())
    const hh = h.padStart(2, '0')
    const m = String(date.getMinutes())
    const mm = m.padStart(2, '0')
    const s = String(date.getSeconds())
    const ss = s.padStart(2, '0')
    const str = dateTemplate
      .replace(/Y{4}/g, YYYY)
      .replace(/MM/g, MM)
      .replace(/DD/g, DD)
      .replace(/hh/g, hh)
      .replace(/mm/g, mm)
      .replace(/ss/g, ss)
      .replace(/M/g, M)
      .replace(/D/g, D)
      .replace(/h/g, h)
      .replace(/m/g, m)
      .replace(/s/g, s)
    return str
  }
}

export const sleep = (time) => {
  return new Promise((resolve) => setTimeout(resolve, time))
}
